Polishing-machine.



No. 823,540. I PATENTED JUNE 19,1906.

D. MQOANUE.

- POLISHING MACHINE.

APPLICATION FILED JUNE 28. 1905.

v 2 SHEETS-SHEET 1 Attorneys PATENTED' JUNE 19, 1906.

No. 823,54Q.

D. MQGANCE.

POLISHING MACHINE. APPLICATION FILED JUNE 28 1905 2 BHIJETS-SHEET 2.

flavzdMmm-em. I

I I Attorneys Witnesses T albwhom it may concern.

UNITED STATES" PAT NT OFFICE.

DAVID MOCANCE, OFLOCKPORT, NEWV YORK;

POLISHING-MACHINE.

Be it known that I, :Dnvrn 'MOOANCE, a citizen of the United States, residing at Lockport, in thecounty of Niagara and State of "and other objects of generally cylindrical I5 I form.

. A further object of the invention is to provide a novel form of machine in which the articles to be polished are carried by a revoluble chuck, which may be reciprocated inthe direction of its length in order to present all portions of the surface to the action of a revoluble polishing wheel.

A still further objectof the invention is to. provide a mechanism ofsimple construction for effecting the reciprocatory movement of the chuck and to provide for the ready opening and closing of said chuck, so that the articles may be quickly placed in position and removed.

With these and other objects in view, as will more fully hereinafter appear, the invention consists in certain novel features of construction and arrangement of parts hereinaf-' ter fully described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size, and minor details of the structure may be made without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings, Figure 1 is a front elevation of a polishing-machine constructed in accordance with the invention. Fig. 2 is aside elevation of the same. Fig. 3 is a detail view, on a larger scale, of a portion of the chuck. Fig. 4 is a transverse section on the line 4 4 of Fig. 1, showing the chuckcarrying spindle and its hollow driving-shaft.

Similar numerals of reference are employed to indicate corresponding parts throughout the several figures of the drawings.

The polishing-wheel 10 may be of any suitable construction; and operated in any suit able manner, the wheel in the present instance being mounted on a short shaft 11', that is ar-.'

Specification of Letters Patent.

Application filed June 28, 1905; Serial No. 267,434.

- Patented June 19, 1906.

ranged at thev forward end of a frame 12, the rear end of which is pivoted on a shaft 13, connected by a suitable belt and pulleys to the shaft 11. The front end of the pivotframe is supported by a spring 14, and a toggle-lever connection 15 is utilized as a means for forcing the frame and the wheel downward in the direction of the work. This portion of the mechanism, however, constitutes no art of the present invention, and the polishing-wheel may be mounted in any suitable At a pointadjacent to the front end of the pivot-frame is a stationary frame including standards 17'and a bed-plate 18, the latter being provided with vertical brackets or standards 19, having bearings 20 for the reception of a hollow shaft 21, on which is mounted a pulley 22, that is connectedby a belt 23 toa driving-pulley 24 on a line-shaft 25.

Extending through the hollow shaft 21 is a longitudinally movable spindle that is feathered to the shaft, so that it may slide freely to and fro within the same, and at one end of the spindle is a chuck 27 for the reception of the Work. The opposite end of the spindle is reduced in diameter and receives a sleeve 28, formed at one end of a pin .29,said pin being carried by lever 30, that is fulcrunied at one end to fixed bracket 31 and is provided at its opposite end with an operating-handle 32, the handle being disposed within convenient reach of the operator, so that by manipulating the same the spindle may be moved to and fro and the work moved transversely of the polishing-wheel, thus presenting all portions of the work to the wheel.

The chuck is formed of two members, each of which is provided with a threaded collar 32, and said collars are grooved for the reception of pins or antifriction-rollers extending from the bifurcated ends of a pair of levers 33 and 34, one of these levers being hung on a bracket 35, depending from the sleeve or other suitable pointof support, while the arm 33 is connected to the lever 34 by a short arm 35, and'the two levers are connected to each other at apoint below this arm by means of a helical tension-spring 37, that tends to draw the levers toward each other.

The two levers 33 and 34 are provided with antifriction-rollers 38, that 'be ar against the opposite faces of a double cam 39, that is carried by a pin 40, and to the pin is secured an operating-handle 41, by which said cam may be turned for the purpose of spreading the levers, and thus spreading the members of the chuck and causing the latter to engage with the article to be polished. When the lever is turned in the opposite direction, the spring 37 will draw the two grooved collars toward each other, and the members of the chuck will hold the work.

In operation the handle 41 is turned in order to open the chuck for the reception of the article to be polished, and on turning the handle in the opposite direction the chuck members are spread and engage with the work. The polishing-wheel and the chuck-carrying spindle being then rotated, the operator may grasp the handle 43 of the polishing-wheel-adj usting'device in the left hand and the handle 32 of the chuck-adjusting device in the opposite hand, and. by manipulating both the article may be thoroughly and perfectly polished.

Having thus described the invention, what is claimed is 1. The combination with a polishingwheel, of a chuck, a spindle carrying said chuck, means for revolving the spindle, and 25.

means for reciprocating said spindle in a direction parallel with the axis of the polishing wheel, whereby the work carried by the chuck may be moved transversely across the periphery of said polishing-wheel.

2. In a polishing-machine, the combination with a polishing member, of a chuck formed of a plurality of sections, a pair of grooved sleeves independently connected to said sections, a pair of levers having bifurcated end portions provided with pins entering said grooved sleeves, a spring tending to draw the levers toward each other, and a revoluble cam for separating said levers;

3. In a device of the class specified, the combination with a polishing member, of a frame, a hollow shaft having hearings in said frame, a spindle extending through such hollow shaft, and feathered thereto, said spindle having a reduced portion at one end, a collar fitting on the reduced end portion of the spindle, a pin projecting from the collar, a lever fulcrumed to the frame and carrying said pin, a two-part chuck arranged at the opposite end of the spindle, grooved collars connected to the chuck members, and a pair of levers having bifurcated end portions provided with pins entering said grooved collars, a spring tending to draw the levers toward each other, and a revoluble cam arranged between the two levers and designed to separate the same and open the chuck.

In testimony that I claim the foregoing as my own I have hereto allixed my signature in the presence of two witnesses.

DAVID MCCANCE.

Vitnesses CHAS. P. KNIFFIN, JOHN B. RICHARDSON. 

